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Nexperia USA Inc. BZX79-B2V4,133
- Part No.:
- BZX79-B2V4,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B2V4,133.pdf
- Description:
- DIODE ZENER 2.4V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:9,784
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Product details
Overview
BZX79-B2V4,133 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 2.4 V nominal Zener voltage at 5 mA test current, 500 mW total power dissipation at 50 °C ambient, and 6.0 A non-repetitive peak reverse current. It serves as a precision low-voltage reference in linear power supply feedback paths and analog sensor biasing circuits.
For engineers reviewing the BZX79-B2V4,133 datasheet, BZX79-B2V4,133 pinout, BZX79-B2V4,133 application, or BZX79-B2V4,133 equivalent, key selection criteria include Zener voltage tolerance (±2%), differential resistance (275–600 Ω), temperature coefficient (−3.5 to −1.6 mV/K), and thermal resistance (380 K/W junction-to-ambient).
Technical Context
This device operates in reverse breakdown mode with tightly controlled Zener voltage regulation across its specified test current range. Its low 2.4 V nominal voltage places it in the sub-3 V category where temperature coefficient is strongly negative and highly sensitive to operating current.
The SOD27 package enables axial lead mounting on PCBs without metallization pads, with thermal performance governed by lead length (≤8 mm) and tie-point temperature (≤50 °C). Junction temperature may reach +200 °C under transient surge conditions, but steady-state operation is limited by 400–500 mW power derating above 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.35–2.45 V at IZ = 5 mA - defines stable reference point for low-voltage analog circuitry |
| Tolerance | ±2% - enables high-accuracy voltage referencing without post-calibration |
| Differential Resistance (rdif) | 275–600 Ω - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | −3.5 to −1.6 mV/K - quantifies voltage drift with ambient temperature change |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - sets maximum continuous DC power handling under standard PCB mounting |
| Reverse Current (IR) | 50 μA at VR = 1 V - specifies leakage level below breakdown, critical for low-power standby circuits |
| Non-repetitive Peak Reverse Current (IZSM) | 6.0 A at tp = 100 μs - defines surge immunity for transient overvoltage protection |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a band on the body. Leads are tinned copper-clad steel, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage regulation node | Connected to higher-potential side; delivers stable 2.4 V reference when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables direct use in 2.4 V reference designs without trimming or calibration |
| Hermetic SOD27 glass package | Ensures long-term parameter stability and moisture resistance in industrial environments |
| 500 mW power rating at 50 °C | Supports continuous operation in compact, unventilated enclosures with minimal heatsinking |
| Low 2.4 V nominal Zener voltage | Permits regulation in battery-powered systems and 3.3 V/2.5 V logic domains |
| Negative temperature coefficient | Compensates for positive drift in associated components (e.g., op-amps, resistors) in mixed-signal circuits |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Stabilizing output voltage in discrete linear regulators using TL431 or discrete transistor shunt topologies. IC Role / Device Role / Timing Role: Zener diode provides precise 2.4 V reference for error amplifier feedback divider. Use Value: ±2% tolerance ensures output accuracy within ±1% over line/load/temperature without trimming. | Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or bridge-based pressure sensors. IC Role / Device Role / Timing Role: Low-drift 2.4 V reference source for ratiometric sensor signal conditioning. Use Value: Negative temperature coefficient partially offsets RTD self-heating drift, improving system-level accuracy. |
| Low-Voltage Microcontroller Reset Circuit | ADC Reference Stabilization |
Use Scenario: Generating reliable reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Zener clamps reset line voltage to 2.4 V, triggering external reset IC or internal POR logic. Use Value: 50 μA max reverse leakage at 1 V ensures negligible current draw in sleep mode. | Use Scenario: Stabilizing reference input of 12-bit SAR ADCs in portable instrumentation. IC Role / Device Role / Timing Role: Provides low-noise, low-drift reference voltage for ADC VREF pin. Use Value: Differential resistance <600 Ω minimizes code-dependent reference droop during conversion sampling. |
Availability
BZX79-B2V4,133 is available at Aetrix Electronics and suitable for low-voltage reference design, analog sensor interface, and microcontroller reset circuit applications requiring stable component supply and long-term parametric consistency.
Supply support for BZX79-B2V4,133 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, consumer, and wearable markets with high-volume, high-reliability components.
The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for precision low-power voltage referencing in cost-sensitive, space-constrained analog and mixed-signal applications.
FAQ
What is the maximum continuous forward current for BZX79-B2V4,133?
The maximum continuous forward current is 250 mA at Tamb = 25 °C. This rating assumes no significant self-heating; actual usable current depends on PCB thermal design and ambient temperature. Forward conduction is not the intended operating mode-this diode is designed for reverse-bias Zener regulation, not rectification.
Can BZX79-B2V4,133 be used in place of BZX79-C2V4?
No-BZX79-B2V4,133 has ±2% Zener voltage tolerance versus ±5% for the 'C' grade. Substituting introduces up to ±3% additional error in reference-critical applications. The 'B' grade also exhibits tighter differential resistance (275–600 Ω vs. 300–600 Ω typical) and different temperature coefficient behavior, affecting thermal stability.
What is the thermal resistance from junction to ambient for this diode?
The junction-to-ambient thermal resistance is 380 K/W under standard mounting conditions: axial leads ≤8 mm long, mounted on a PCB without metallization pad. This value assumes natural convection only and decreases with shorter leads or added copper pour. Derating begins above 50 °C ambient per the 500 mW limit.
Does this Zener diode require a series current-limiting resistor in operation?
Yes-operation requires a series resistor to set the Zener test current (5 mA nominal) and prevent thermal runaway. For a 5 V supply, a 520 Ω resistor establishes ~5 mA; for 3.3 V, a 220 Ω resistor is appropriate. Resistor power rating must exceed I²R losses, especially under worst-case voltage and temperature conditions.
BZX79-B2V4,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ALF2
BZX79-B2V4,133 FAQ
1.How can I place an order for BZX79-B2V4,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B2V4,133 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX79-B2V4,133 reliable?
The price and inventory of BZX79-B2V4,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B2V4,133 is usually 5 days.
3.What payment methods are accepted for BZX79-B2V4,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B2V4,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B2V4,133?
BZX79-B2V4,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B2V4,133 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX79-B2V4,133?
For technical support, including BZX79-B2V4,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B2V4,133 requirements.
6.How does Aetrix verify that BZX79-B2V4,133 is sourced from the original manufacturer or authorized distributors?
All BZX79-B2V4,133 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX79-B2V4,133 meets industry standards.
7.What is the process for return or replacement of BZX79-B2V4,133?
All BZX79-B2V4,133 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B2V4,133, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX79-B2V4,133 part is unused and in its original packaging.
Return procedure for BZX79-B2V4,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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